body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
  }
  
  h3 {
    margin-top: 0;
  }
  
  input[type="number"], input[type="text"] {
    border: 1px solid #ccc;
    border-radius: 4px;
  }
  